This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A093441 #18 Jan 19 2023 09:36:28
%S A093441 3,7,31,211,2311,43891,1272811,16546531,976245271,36121074991,
%T A093441 1119753324691,52628406260431,3526103219448811,186883470630786931,
%U A093441 7662222295862264131,743235562698639620611,54256196077000692304531,6130950156701078230411891,631487866140211057732424671
%N A093441 Lexicographically earliest sequence of primes such that a(n) - 1 == 0 (mod a(n - 1) - 1) where a(n) - 1 is a squarefree number; a(1) = 3.
%H A093441 Amiram Eldar, <a href="/A093441/b093441.txt">Table of n, a(n) for n = 1..341</a>
%t A093441 a[1] = 3; a[n_] := a[n] = Block[{k = m = a[n - 1] - 1}, k *= 2; While[ !PrimeQ[k + 1] || !SquareFreeQ[k], k += m]; k + 1]; Table[ a[n], {n, 17}] (* _Robert G. Wilson v_, Apr 30 2004 *)
%Y A093441 Cf. A073918, A093442.
%Y A093441 Distinct from A073918.
%Y A093441 Cf. A083772. - _R. J. Mathar_, Sep 05 2008
%K A093441 nonn
%O A093441 1,1
%A A093441 _Amarnath Murthy_, Apr 01 2004
%E A093441 a(7)-a(17) from _Robert G. Wilson v_, Apr 30 2004
%E A093441 a(18)-a(19) from _Amiram Eldar_, Jan 19 2023